Hydraulic wall hook



Aug. 3 1926. 1,594,668

- P. G. GATES ET AL HYDRAULIC WALL HOOK Filed Sept. 8, 1925 5Sheets-Sheet 1' v Aug. 3, 1926. 1,594,668

P. G. GATES ET AL YDRAULIC WALL HOOK Filed p 1925 5 Sheets-Sheet 5 a x 1ga i I 4 i i Patented Aug. 3, 1926.

STATES PAUL e. earns Ann EARL-H.

REEDER, OF LONG BEACH, MONEIA, AND ROY W. YOUNG, OF LONG BEACH,

CALIFORNIA.

HYDRAULIC WALL HOOK.

Application filed September 18, 1925. Serial Nb. 57,144.

This invention relates to improvements in tlons.

The primary object of the invention is to provide an improved form offishing tool which is' primarily designed to recover the broken off ortwisted off sections of drill pipe and the like from the bottom of thewell hole. In well drilling by means of a rotary drilling outfit, it notinfrequently happens that the lower end of the drillpipe breaks ortwists off. If the well hole is straight there is usually butcomparatively small dilfi'culty in recovering the fish which is theremaining section of drill pipe. However, in many infis ing toolsemployed in well drilling operastances there are cave-ins or. cavitiesin the the fish under sides of -the well hole, and when the drill pipetwists or breaks ofi,'it often leans against the side of the well holeand extends upwardly into the cavity. In such cases it is extremelydifiicult to recover the section of drill pipe. The improved fishingtool or Wall hook is primarily designed to recover such circumstances.\Vith the foregoing and other objects in view which will be mademanifest in the following detailed description'and specifically pointedout in the appended claims, reference is had to the accompanyingdrawings for an illustrative embodiment of the invention, wherein Figure1 is a side elevation, parts being broken away and shown in verticalsection, through the improved fishing tool or wall hook,

Fig. 2 is a rear elevation of the improved fishing tool, parts beingbroken away and shown in section,

Fig. 3 is a side elevation of the tool from the opposite side from thatshown in Fig. 1,

1g. 4 1s a view in elevation of the arm constituting the moving part ofthe tool,

Fig. 5 is a partial perspective view illustrating the form of the .hookprovided on the lower'end of the arm shown in Fig. 4,

Fig. 6 isa front view in elevation of the body of the hook, parts beingshown in section v Fig. 7 is a side elevation of the body shown in Fig.6,

body,

Fig. 9 is a vertical hole, illustrating the fish therein and the tratingthe manner in which Fig. 8 is a vertical section through the sectionthrough a well manner in which it is first improved tool, a

F 1g. 10 1s a view slmllar engaged by the to Fig. 9, illusthe fish ishandled after it is engaged,

Fig. 11 is a view through the well hole, illustrating the manner inwhich the tool engages the fish preparatory to lifting the fish fromWithin the well hole,

Fig. 12 is a section view illustratin a modified form of hook on thelower em? of the arm.

Fig. 13 is a horizontal sectiontaken on the line 13-13 of Fig. 12, and

Fig. 14 is a perspective view of the slidable slip employed in themodification shown in Fig. 12.

Referring to the accompanying drawings wherein similar referencecharacters designate similar parts throughout, the improved toolconsists of a. body 10, the upper portion 2 of which is cylindrical inform and which is s provided a flat face 15. A horizontal aperture 16 isformed through the body and, which is internally threaded. This aperturehas its ends enlarged, as indicated at 17,

CLARENCE 1a round, or"

and is arranged adjacent the forward side 5 15. Below the aperture 16the forward side 15 is straight but downwardlyinclined t0- Ward-the axisof the body, as indicated at 18. A bore 19 is formed longitudinallythrough the body 10 and has its upper end enlarged and its lower end ofreduced diameter,'a-s indicated at 19, providing a valve seat 20. Ahorizontal bore 21 is formed in the body immediately above the valveseat 20 and provides a chamber for the ball check valve 22. Theforwardor outer end of the horizontal bore 21 is enlarged, as indicated at 23,and a plunger 24 having its outer end enlarged, as at 25, is slidablewithin the bore 21. A groove is formed in the forward face .15 of thebody, this groove being indicated at 26, and communicates with theenlarged portion 23 of the horizontal bore 21.

Adjacent the upper ends of the'parallel side faces 13 and 14 there areformed arcuate slots'27. Depending flanges or guides 28 ex-' tenddownwardly from the upper cylindrical portion of the bodylO over thestraight parallel sides 13 and 14. These flanges 28 are undercut toprovide grooves which are arcuate in form and which are indicated at 29.An arm 30 has its upper end provided with a back wall 31 and parallelside walls 32 and 33. This arm is pivotally connected to the body 10 bymeans of pins or screws 34, which extend through apertures in the sides32 and 33 and the aperture 16. The upper ends of the sides 32 and 33 areprovided with offsets 35 and 36' which are receivable within the grooves29.beneath the depending flanges 28. Pins 37 are mounted upon the upperends of the sides 32 and 33 and have their heads slidable within theslots 27. On the face of the back Wall 31 of the arm 30, which ispositioned against the front face of the body, there is formed a groove38 which communicates with the groove or slot 26 on the forward face ofthe body. The arm 30 extends a considerable distance downwardly from thebottom of the body, and on its lower end there is provided asemi-circular, horizontally arranged hook 39 which may be provided witha depending finger 40. The top surface of the hook 39 provides ashoulder which is continued, as indicated at 41, around against theinner face of the arm 30. In the bottom of the body 10 there is formedan internally threaded recess 42 which receives the threaded pin of atap 43, this tapbeing provided with a safety joint connection with thebody, as indicated at 44. The tap 43 has a bore 45 forming acontinuation of the reduced sec-' tion 19 of the longitudinally arrangedbore 19. Across the top of the bore 19 there is driven an inclined pin46 which limits the upward movement of the ball check valve 22 withinthe bore 19.

The operation of the device is as follows: In Figures 9, 10 and 11 thewell hole is illustrated at W, there being a cavity C formed in one sidethereof. The fish is indicated at F and consists of the broken off ortwisted off section of drill pipe. This fish is shown as leaning againstthe sides of the well hole and having its upper end disposed within thecavity C. For purposes of illustration, the fish shown has been sobroken off that a collar or tool joint T is left on its upper end. Theimproved tool is secured to the lower end of the drill pipe D and islowered into the well hole, the arm 30 assuming a position hangingvertically downwardly from the body 10. Byinspecting the recoveredsection of threaded pipe, which was removed from thehole after the fishF was twisted off, the location of the upper end of the fish F canbeapproximately determined within the well hole. The drill pipe D islowered the required distance and during the lowering operation thefluid within .D is released and the drill the well hole passes upwardlythrough the bores 45, 19 and 19 into the drill tube D,

so that the pressures on the inside and on the outside of the tool willbe equalized. As clearly shown. in Fig. 8, when the plunger 24 is in itsinnermost position, which is when the arm hangs vertically, the checkvalve is maintained'otf from its seat, so that the well fluid mayreadily pass through the bores in the body. \Vhen the drill pipe D hasbeen lowered the required distance, so that the lower end of the arm30'is below the upper end of the fish, pressure is applied within thedrill pipe by starting up the mud or circulation pump. At first thefluid flows downwardly through the bores 19, 19 and 45, but as thepressure is increased, some pressure is developed within the end of thehorizontal bore 21, forcing the lunger 24 outwardly from the body, andallowing the ball 22 to seat and thus increasing the pressure developedwithin the end of the bore 21. The end of the plunger engages the upperend of the backwall 31 on the arm 30, as clearly shown in Fig. 1, andwhen it moves outwardly, it swings the arm from the position shown inFig. 1 to the inclined position shown in Fig. 9. The drill pipe D isthen rotated and the hook 39 on the bottom of the arm sweeps around thewalls of the well hole WV or adjacent to them. The semi-circular hook 39can enter the cavity C and can engage uponthe fish F, receiving the fishwithin the hook. When the fish has been engaged, the pressure within thedrill pipe pipe is slightly elevated, causing the tool jolnt or collar Tto be engaged by the top face of the hook 39 and the shoulder 41. Thearm 30 will again assume a vertical position and will lift the fish Ffrom the bottom of the well hole, thus straightening the fish up withinthe well hole. The drill pipe D can then be lowered preferably ratherquickly so as to cause the fish F to stickup in an approximatelyvertical position within the well hole. When in such osition the drillpipe can be lowered and tiie tap 43 can be caused to threadedly engagethe upper end of the fish and the-fish can then be removed from the wellhole. The offsets 35 and 36 together with the pins 37 assist the pins 34in transmitting the weight of the fish F from thearm 30 to the body.construction operates The above described very satisfactorily when it sohappens that the lower end of.

drill pipe breaks intermediate its ends, so that there is no shoulder onits upper end,

which may be engaged by the top of the hook 39 and the shoulder 41. Insuch instances instead of using the arm 30, as shown end, on one vsideof which teeth 47 are,

formed. On the opposite side of the semicircular hook there is formed agroove 48 which is dove-tailed inform to receive the dove-tail 49 on aslidable slip 50., In using this arm, when the hook engages the fish,the slip 49 will slide downwardly in the inclined groove 48 and engagethe cylindrical surface of the fish, tightening upon it and permittingit to be lifted so as to be set up straight and then lowered as before.

If it should so happen that the drill pipe has been partially collapsedat its upper end, so that it is diificult to cause the tap 43 to enterit, a die collar may be substituted for the tap 43 and caused tothreadedly engage the upper end of the fish. The question as to whetherthere is a tool joint T adjacent the upper end of the fish or not can bereadily determined from an inspection of the bottom end of the drillpipe, which was removed from the well after the fish was lost, so thatthe drill crew can ascertain whether to use the arm having the shoulder41 or the arm having the teeth 4? and the slip 50.

The purpose of the slot 26 and the groove 38 is to allow any circulationfluid which might collect beneath the enlarged portion 25 of the plunger24 to escape when the arm assumes its vertical position shown a thefluid within the drill in Fig. 10. Because of the fact that the plunger24seats the ball'22 when in its innermost position, it will be readilyappreciated that on lifting the fish out of the well, pipe may readilydrain therefrom through the bores 19, 19 and i5.

From the above it will be appreciated that an improved form Offishingtool or wall hook is provided which has a hydraulically operated armadapted to engage the walls of the well and sweep thereagainst so as toencounter the fish which may be leaning against the walls of the well.By the improved construction it is possible to easily and quicklyrecover the fish from the well whereas heretofore when the fish leanedwithin a cavity, such as C, great difficulty has been experienced, oftenrequiring side tracking and sometimes an abandonment of the well hole.

It will be understood that various changes in the detail of constructionmay be made without departing from the spirit or scope of the inventionas defined by the appended claims.

We claim:

1. A wall hook comprising a body, an arm pivotally connected to saidbody, said arm having a semi-circular hook formed thereon, and meansincluding a hydraulically operated piston for swinging the armrelatively arm relatively to the body,

to the body, so that it may be caused to engage the walls of a wellhole.

2. A wall hook comprising a body, an

arm pivotally connected to said body, said arm having a semi-circularhook formed thereon, means for swinging the arm relatively to the bodyso that it may be caused to engage the walls of a Well hole, andthreaded means mounted upon said body adapted to be caused to threadedlyengage a fish after the fish has been straightened up in the well holeby said arm.

3. A wall hook comprising a body, an arm pivotally connected to saidbody, hydraulically operated means for moving the so that it may engagethe walls of a well hole, and means carried by the arm engageable upon afish so that the fish-may be elevated thereby.

4. A wall hook comprising a body, an arm pivotally connected to saidbody, hydraulically operated means for moving the arm relatively to thebody, engage the walls of a well hole, and means carried by the armengageable upon a fish so that the fish may be elevated thereby, andthreaded means mounted upon the body adapted to be caused to threadedlyengage the fish after the fish has been straightened up by means of saidarm.

5. A wall hook comprising a body, an arm pivotally connected to the bodyand normally hanging vertically therefrom, means so that it may carriedby the arm engageable upon a fish, I

and hydraulically operated means for causing the arm to assume aninclined position with respect to the body, whereby upon rotation of thebody, the arm may be caused to sweep adjacent or against the walls ofthe well hole.

6. A wall hook comprising a body, an arm pivotally connected to the bodyand normally hanging vertically therefrom, means carried by the armengageable upon a fish, hydraulically operated means for causing the armto assume an inclined position with respect to the body, whereby uponrotation of the body, the arm may be caused to sweep adjacent or againstthe walls of the well hole, and threaded means carried by the bodyadapted to be caused to threadedly engage the fish.

7. A fishing tool comprising a body having a longitudinal bore thereinand a horizontal bore communicating therewith, a plunger slidablydisposed within said horizontal bore, and a fish engaging member pivotedto said bodyand engageable by said plunger, whereby when fluid pressureis 'ap plied within said longitudinal bore, said plunger may be forcedoutwardly within said horizontal bore and be caused to swing said fishengaging member relatively to said body.

iao I ing a longitudinal bore therein and a horizontal borecommunicating therewith, a plunger slidably disposed within saidhorizontal bore, and a fish engaging member pivoted to said body andengageable by said plunger, whereby when fluid pressure is appliedwithin said longitudinal bore, said plunger may be forced outwardlywithin said horizontal bore and be caused to swing said fish engagingmember relatively to said body, said fish engaging member having asemi-circular hook formed upon its lower end.

9. A fishing tool comprising a body having a longitudinal bore thereinand a horizontal bore communicating therewith, a

I plunger slidably disposed within said horiing a bore formedlongitudinally therethrough, the lower end of the bore being reduced toform a valve seat, there being a horizontal bore formed in the bodys;ightly above the valve seat, a ball disposed wlthin said longitudinalbore adapted to seat upon said valve seat, a plunger slidable withinsaid horizontal bore adapted to move outwardly therein when pressure isapplied 'within the body, means limiting the inward movement of theplunger, said plunger serving to unseat the ball from its seat when inits innermost position, and an arm pivoted upon said body engageable bysaid plunger so as to swing in avertical plane, said arm having ahorizontally arranged, semi-circular hook formed on its lower end.

11. A fishing tool comprising a body having a bore formed longitudinallytherethrough, thedower end of the'bore being reduced to form'a valveseat, there being a horizontal boreformed in the body slightly above thevalve seat, a ball disposed within said longitudinal bore adapted toseat upon said valve seat, a plunger slidable within said horizontalbore adapted to move outwardly therein when pressure is applied withinthe body, means limiting the inward movement of the plunger, saidplunger serving to unseat the ball from its seat-when in its innermostposition, an arm pivoted upon said body engageable by said plunger so asto swing in a vertical plane, said arm having a horizontally arranged,semi-circular hook formed on its lower end, and threaded meansdetachably secured to the body adapted to be caused to threadedly engagea fish.

12. A wall hook comprising a body, an arm pivotally connected to thebody, and means operable by fiuid pressure to swing said arm outwardlywith respect to the body so that it may engage the walls of a well hole,said arm being provided with an approximately semi-circular lateralextension adapted to be caused to engage and tolift a fish.

13. A wall hook comprising a body, an

arm pivotally connected to the body, means operable by fluid pressure toswing said arm outwardly with respect to the body so that it may engagethe walls of a well hole, said arm being provided with an approximatelysemi-circular lateral extension adapted to be caused to engage and tolift a fish, and means carried by the body adapted to engage upon thefish after it has been straightened up in the well hole by said arm.

14. A wall hook comprising. a body, an arm pivotally connected to thebcdy, means operable by fluid pressure to swing said arm outwardly withrespect to the body so that it may engage the walls of a well hole, saidarm being provided with an approximately semi-circular lateral extensionadapted to be caused to engage and to lift a fish, and threaded meanscarried by the body adapted to be threadedly connected to the fish afterit has been straightened up in the well hole by said arm.

In testimony whereof we have signed our names to this specification.

'ROY W. YOUNG.

C. P. YOUNG.

EARL H. REHDER. PAUL G. GATES.

